Explain the raster scan monitors, Computer Engineering

Assignment Help:

Explain the raster scan monitors

The refresh process must also be performed for raster scan monitors. Most television monitors are raster scan display devices : one scan-line at a time. Raster scan systems uses a memory buffer called frame buffer (or refresh buffer) in which the intensities of the pixels are stored. Refreshing the screen is performed using the information (intensity of each pixel) stored in the frame buffer. Frame buffer can be treated as a two-dimensional array. Raster display devices read the frame buffer and activate the three phosphor dots in the triad according to the value read from the frame buffer.

The entire contents of the frame buffer should be read and the pixels should be activated appropriately at a sufficiently high rate to avoid flickering of the picture. Depending on the persistence of the phosphor coated inside the screen, the monitors require different refresh rates. In some raster display devices, a frame buffer is displayed in two passes. This kind of refreshing is called interlaced. In the first pass the odd rows are refreshed, while the even rows are refreshed in the second pass. Thus, the screen is refreshed in half the time. Though this approach does not really increase the rate of refreshing the screen, but is quite effective in reducing the flicker.

 


Related Discussions:- Explain the raster scan monitors

Bit manipulation techniques, We can also use the logical operators to numbe...

We can also use the logical operators to numbers directly and  perform simple bit manipulation . The operators are     &  Bitwise AND     |  Bitwise OR     ^  Bitwise exclusiv

Why sram are said to be volatile, Why SRAM are said to be volatile? Bec...

Why SRAM are said to be volatile? Because their contents are lost when power is interrupted. So SRAM are said to be volatile.

Determine the synchronization of bits, Determine the synchronization of bit...

Determine the synchronization of bits The synchronization provided by use of start and stop bits, an extra bit known as a parity bit may optionally be transmitted along with th

Modality and cardinality, Ask question #Midifference between cardinality an...

Ask question #Midifference between cardinality and modality nimum 100 words accepted#

Define html, HTML is a Hyper text Markup Language and it is  Scripting La...

HTML is a Hyper text Markup Language and it is  Scripting Language

#titlesoftware interface.., draw circuit diagram and the truth table that r...

draw circuit diagram and the truth table that represent demultiplexer

Design a 8 to 1 multiplexer using the fourvariable function, Design a 8 to ...

Design a 8 to 1 multiplexer by using the fourvariable function given by F(A, B, C, D) = ∑ m(0,1,3,4,8,9,15). Ans. Design of 8 to 1 Multiplexer: It is a four-variable function a

Problem specification - logic programs, Problem Specification : Hence ...

Problem Specification : Hence given the above context for "ILP" there we can state the learning problem as follows: that we are given a set of positive and a set of negative e

Invoke on the dataadapter control, Which method do you invoke on the DataAd...

Which method do you invoke on the DataAdapter control to load  your generated dataset with data? DataAdapter.Fill(ds). The beauty of this method is it automatically implicitly

Explain the term- intranet, Explain the term- Intranets Various compani...

Explain the term- Intranets Various companies use intranets as well as the internet. Simple definition is "An intranet is a computer network which is based on internet technolo

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd